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Emekcan Aras
6bdf52fb09
This fixes a race that is observed rarely in the FVP. It occurs in FVP when tfm sends the notication ack in openamp, and then reset the access request which resets the mhu registers before received by the host processor. It implements the fix both in SE and the host processor openamp wrapper. This solution enables polling on the status register of mhu until the notificaiton is read by the host processor. (Inspired by signal_and_wait_for_signal function in mhu_wrapper_v2_x.c in trusted-firmware-m https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/platform/ext/target/arm/rss/common/native_drivers/mhu_wrapper_v2_x.c#n61) Signed-off-by: Emekcan Aras <emekcan.aras@arm.com> Signed-off-by: Jon Mason <jon.mason@arm.com>